Fuel tanks and construction machinery equipment

Abstract

The present application relates to the field of fracturing equipment, and specifically to a fuel tank and engineering machinery equipment. The fuel tank provided by the present application includes a main fuel tank, a subsidiary fuel tank and a control valve; the subsidiary fuel tank is located in the upper space inside the main fuel tank; the control valve is arranged in the subsidiary fuel tank; when the liquid level in the main fuel tank is lower than the predetermined liquid level, the control valve opens to allow the oil in the subsidiary fuel tank to flow to the main fuel tank. The fuel tank of the present application is able to replenish oil to the main fuel tank when the liquid level in the main fuel tank is lower than the predetermined liquid level by arranging the subsidiary fuel tank in the main fuel tank, thereby ensuring that the lowest liquid level in the main fuel tank is always above the main pump suction port, making it less likely for the main pump to be emptied, and extending the stability and service life of the hydraulic components that use the fuel tank for oil supply. The engineering machinery equipment provided by the present application includes the above-mentioned fuel tank, and therefore also has the effect that the fuel tank is less likely to be emptied by the main pump.

Description

Technical Field

[0001] The present invention relates to the field of mechanical equipment, and in particular to an oil tank and engineering mechanical equipment. Background Art

[0002] During the application of hydraulic oil tanks used in construction machinery such as excavators, due to spatial limitations, the main pump oil suction port needs to be set on one side of the hydraulic oil tank. This inevitably leads to the main pump oil suction port being positioned too high, making it prone to main pump air suction. Air suction can cause air to enter the hydraulic system, corrode hydraulic components, cause pipeline blockage, and reduce the service life of hydraulic components.

[0003] To avoid the above problems, the current practice is to raise the position of the lowest liquid level of the hydraulic oil tank (for example, providing a cavity structure at the bottom of the lowest liquid level of the tank), but this will lead to an unstable hydraulic oil tank structure and waste materials. Summary of the Invention

[0004] The object of the present invention is to provide an oil tank and engineering machinery equipment, so as to solve the problem that the main pump is prone to cavitation to a certain extent.

[0005] The present application provides a fuel tank comprising a main fuel tank, a subsidiary fuel tank and a control valve;

[0006] The auxiliary oil tank is located in the upper space inside the main oil tank; the control valve is arranged in the auxiliary oil tank;

[0007] When the liquid level in the main oil tank is lower than a predetermined liquid level, the control valve opens to allow the oil in the auxiliary oil tank to flow into the main oil tank.

[0008] In the above technical solution, preferably, the oil tank further includes a first liquid level detection element, which is arranged in the main oil tank and is used to detect the liquid level in the main oil tank.

[0009] In any of the above technical solutions, preferably, a main pump oil suction port is provided on the main oil tank, and the predetermined liquid level is not lower than the position of the main pump oil suction port.

[0010] In any of the above technical solutions, preferably, the distance between the bottom of the auxiliary fuel tank and the bottom of the main fuel tank is 80%-85% of the height of the main fuel tank.

[0011] In any of the above technical solutions, preferably, the oil tank further includes a control device, and the control device is communicatively connected to the first liquid level detection element and the control valve respectively;

[0012] The control device is capable of acquiring the actual liquid level measured by the first liquid level detection element and comparing the actual liquid level with the predetermined liquid level;

[0013] When the actual liquid level is lower than the predetermined liquid level, the control device controls the control valve to open; when the actual liquid level is greater than or equal to the predetermined liquid level, the control device controls the control valve to close.

[0014] In any of the above technical solutions, preferably, the first liquid level detection element is a liquid level sensor.

[0015] In any of the above technical solutions, preferably, the control valve is a one-way valve.

[0016] In any of the above technical solutions, preferably, the main pump oil suction port is a side suction oil suction port, and the main pump oil suction port is arranged on the side wall of the main oil tank.

[0017] In any of the above technical solutions, preferably, a second liquid level detection element is provided in the auxiliary tank for detecting the liquid level in the auxiliary tank; and / or

[0018] The main oil tank and the auxiliary oil tank are respectively provided with oil replenishing ports.

[0019] The present application also provides an engineering machinery equipment, including the above-mentioned oil tank.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The oil tank provided in the present application is capable of replenishing oil to the main oil tank when the liquid level in the main oil tank is lower than a predetermined level by arranging a sub-oil tank inside the main oil tank, thereby ensuring that the minimum liquid level in the main oil tank is always above the oil suction port of the main pump, making it less likely for the main pump to be sucked dry, and extending the stability and service life of the hydraulic components that use the oil tank for oil supply.

[0022] The engineering machinery equipment provided in the present application includes the above-mentioned oil tank, and therefore has the effect of preventing the oil tank from being easily emptied by the main pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a fuel tank provided in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1- Main oil tank, 2- Auxiliary oil tank, 3- First liquid level detection element, 4- Control valve, 5- Predetermined liquid level, 6- Control device, 7- Main pump oil suction port. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0029] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0033] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0034] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0035] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0036] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0037] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0038] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0039] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0040] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0041] Refer to the following Figure 1 An oil tank and engineering machinery equipment according to some embodiments of the present invention are described.

[0042] Example 1

[0043] This embodiment provides a fuel tank for engineering machinery equipment, particularly for excavators.

[0044] See also Figure 1 As shown, the oil tank includes a main oil tank 1 , a subsidiary oil tank 2 , a first liquid level detection element 3 , a control valve 4 and a control device 6 .

[0045] The main oil tank 1 is used to store hydraulic oil. A side suction main pump oil suction port 7 is provided on the side wall of the main oil tank 1. The main pump oil suction port 7 is used to connect to the main pump to supply oil to the main pump.

[0046] The first liquid level detection element 3 is provided in the main oil tank 1 and is used to detect the liquid level in the main oil tank 1 . For example, the first liquid level detection element 3 may specifically be a liquid level sensor.

[0047] The auxiliary tank 2 also stores hydraulic oil. It is fixedly mounted inside the main tank 1 and located in the upper portion of the main tank 1. The main tank 1 is designed to allow for 15% to 20% of excess space in the upper portion to prevent oil from overflowing when tilted. The auxiliary tank 2, housed within this excess space, acts as a small internal tank to replenish the main tank 1 when the oil level is low. This design fully utilizes the internal space, increasing the tank's overall capacity. It also reduces the tank's height (eliminating the need for a cavity at the bottom to raise the minimum liquid level), improving its structural stability. Furthermore, the distance between the bottom of the auxiliary tank 2 and the bottom of the main tank 1 is preferably 80% to 85% of the height of the main tank 1. This allows the auxiliary tank 2 to fully utilize the remaining space within the main tank 1, resulting in a more rational layout.

[0048] The control valve 4 is disposed at the oil drain port of the auxiliary tank 2. The control valve 4 is used to control whether the auxiliary tank 2 is connected to the main tank 1. That is, when the control valve 4 is open, the oil in the auxiliary tank 2 can flow from the control valve 4 to the main tank 1; when the control valve 4 is closed, the auxiliary tank 2 and the main tank 1 are disconnected. Preferably, to prevent the oil in the main tank 1 from flowing into the auxiliary tank 2 when the tank shakes or when there is a large amount of oil in the main tank 1, the control valve 4 of this embodiment is configured as a one-way valve. In addition, to ensure that all the oil in the auxiliary tank 2 can flow out, the oil drain port of the auxiliary tank 2 is disposed at the bottom of the auxiliary tank 2, that is, the control valve 4 is also disposed at the bottom of the auxiliary tank 2.

[0049] The control device 6 is connected to the first liquid level detection element 3 and the control valve 4 in communication (wired or wireless) to obtain the liquid level signal detected by the first liquid level detection element 3 and perform processing. After the processing, the control signal is output to the control valve 4 to control the opening and closing of the control valve 4. Specifically, the predetermined liquid level 5 is when the liquid level in the main oil tank 1 reaches the predetermined position. The predetermined liquid level 5 is not lower than the position of the main pump oil suction port 7 of the main oil tank 1, that is, the predetermined liquid level 5 is higher than or equal to the position of the main pump oil suction port 7. Figure 1The figure shows the situation where the predetermined liquid level 5 is equal to the position of the main pump oil suction port 7 (the position of the center of the main pump oil suction port 7). The first liquid level detection element 3 can obtain the actual liquid level in the main oil tank 1 in real time and transmit the actual liquid level signal to the control device 6. When the control device 6 receives the actual liquid level signal, it can compare the actual liquid level signal with the predetermined liquid level 5. If the actual liquid level is less than (or lower than) the predetermined liquid level 5, it means that the oil in the main oil tank 1 is unable to fully supply oil to the main pump, and the main pump may be at risk of sucking air. At the same time, the control device 6 controls the control valve 4 to open, so as to replenish oil into the main oil tank 1 as soon as possible, so as to increase the liquid level of the oil in the main oil tank 1 and realize air separation oil supply to the main pump. When the actual liquid level is greater than or equal to (reaches or is higher than) the predetermined liquid level 5, the control device 6 controls the control valve 4 to close, and the auxiliary oil tank 2 no longer replenishes oil to the main oil tank 1. During the above control process, the control device 6, the first liquid level detection element 3, the control valve 4 and the auxiliary oil tank 2 form a minimum liquid level control feedback system. Through this system, it can be ensured that the minimum liquid level in the main oil tank 1 is always above the main pump oil suction port 7, and the main pump is not prone to emptying, thereby extending the stability and service life of the hydraulic components that use the oil tank for oil supply.

[0050] It should be noted that the control device 6 may be a controller with data information comparison and transmission capabilities in the prior art.

[0051] In addition, to facilitate oil replenishment of the main fuel tank 1 and the auxiliary fuel tank 2, a refueling port (not shown) is provided on both the main fuel tank 1 and the auxiliary fuel tank 2. Preferably, the refueling port of the main fuel tank 1 is provided at the top of the main fuel tank 1 and is connected to the first refueling pipe; the refueling port of the auxiliary fuel tank 2 is provided at the top of the auxiliary fuel tank 2 and is connected to the second refueling pipe.

[0052] In addition, in order to facilitate understanding of the condition of the oil stored in the auxiliary tank 2, the present embodiment provides a second liquid level detection element (not shown in the figure) in the auxiliary tank 2 for detecting the liquid level of the oil in the auxiliary tank 2. The second liquid level detection element may also be a liquid level sensor. Preferably, the second liquid level detection element is also communicatively connected with the control device 6 so as to obtain the liquid level information of the second liquid level detection element through the control device 6. When the liquid level in the auxiliary tank 2 obtained by the control device 6 is lower than the predetermined liquid level of the auxiliary tank 2, the control device 6 may control the oil replenishing device (such as the second oil replenishing pipe) of the auxiliary tank 2 to perform the oil replenishing operation, or control the reminder device (such as an alarm) to issue a prompt message to prompt the operator to perform the oil replenishing operation.

[0053] Example 2

[0054] This embodiment provides an engineering machinery equipment, including the oil tank of the above embodiment, and thus has all the beneficial technical effects of the oil tank of the above embodiment, which will not be described in detail here.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel tank, characterized in that: Including main fuel tank, auxiliary fuel tank and control valve; A 15% to 20% remaining space is reserved in the upper portion of the main tank, and the auxiliary tank is disposed in the remaining space in the form of a built-in small tank, so that the auxiliary tank is located in the upper portion of the main tank; the control valve is disposed at the oil discharge port of the auxiliary tank, and the oil discharge port of the auxiliary tank is disposed at the bottom of the auxiliary tank, so that the control valve is disposed at the bottom of the auxiliary tank; When the liquid level in the main oil tank is lower than a predetermined liquid level, the control valve opens to allow the oil in the auxiliary oil tank to flow into the main oil tank.

2. The fuel tank according to claim 1, characterized in that It also includes a first liquid level detection element, which is arranged in the main oil tank and is used to detect the liquid level in the main oil tank.

3. The fuel tank according to claim 1, characterized in that The main oil tank is provided with a main pump oil suction port, and the predetermined liquid level is not lower than the position of the main pump oil suction port.

4. The fuel tank according to claim 1, characterized in that The distance between the bottom of the auxiliary fuel tank and the bottom of the main fuel tank is 80%-85% of the height of the main fuel tank.

5. The fuel tank according to claim 2, characterized in that Also included is a control device, the control device being communicatively connected to the first liquid level detection element and the control valve respectively; The control device is capable of acquiring the actual liquid level measured by the first liquid level detection element and comparing the actual liquid level with the predetermined liquid level; When the actual liquid level is lower than the predetermined liquid level, the control device controls the control valve to open; when the actual liquid level is greater than or equal to the predetermined liquid level, the control device controls the control valve to close.

6. The fuel tank according to claim 2, characterized in that The first liquid level detection element is a liquid level sensor.

7. The fuel tank according to claim 1, characterized in that The control valve is a one-way valve.

8. The fuel tank according to claim 3, characterized in that The main pump oil suction port is a side suction oil suction port, and the main pump oil suction port is arranged on the side wall of the main oil tank.

9. The fuel tank according to claim 1, characterized in that A second liquid level detection element is provided in the auxiliary tank for detecting the liquid level in the auxiliary tank; and / or The main oil tank and the auxiliary oil tank are respectively provided with oil replenishing ports.

10. An engineering machinery equipment, characterized in that: Comprising the oil tank according to any one of claims 1 to 9.

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